MINERALOGY. 187 



SECT. CLXXXIX. 



g. With fulphurated iron and filver, Plum- 

 bum ferro £s? argento fulphurato mineralifa- 

 turn, is found, 



a. Fine-grained. 



b. Fine cubical, 



c. Coarfe cubical. Thefe are found at 

 Wefterfiifverberget, in Weftmanland. 



When this ore is fcorihed, it yields a 

 black flag ; whereas the preceding lead 

 ores yield a yellow one, becaufe they 

 do not contain any iron. 



SECT. CXC. 



4. With fulphurated antimony and filver, 

 Plumbum antimonio 6f argento fulphurato 

 mvieralifatum. Antimoniated or radiated 

 lead ore. This has the colour of a Blyglanz, 

 but is of a radiated texture. I 

 It is found, 



a. Of fine rays or fibres, and, 



b. Of coarfe rays or fibres* 



And is got in Maklos Schacht and 

 Fierde-Bottn, in the mine of Salberg in 

 Weftmanland. The lead in this ore 

 prevents any ufe being made of the an- 



to be denominated and d'ftirguifhed from one another accord- 

 ing to their metallic contents. No ore ought, by virtue of 

 the mod received notion, to be called Blyfch-j:eif> but that 

 .b contain t only lead and fulphur. The mod part of the 

 ore< called Blyglanz contain fiiver, even to twenty-four ounces 

 pei c \ of which we have inftances in the mines of Salberg-, 

 where it has been obferved that the coarfe cubical lead ores are 

 generally the richeft in filver, contrary to what is commonly 

 tai^gnt in books ; the reafon of which may perhaps be, that, 

 in making the elTays on thefe two ores, the coarfe cubical can 

 lc choice purer cr freer from the rock, than the fine cubical ores. 



timony 



